Patents Assigned to Groupement pour les Activities Atomiques et Avancees "GAAA"
  • Method and device for electromagnetic pumping by conduction of liquid metals having low electrical conductivity
    Patent number: 3973878
    Abstract: The invention is related to a method for pumping of liquid metals having a low electrical conductivity. To lower the resistance of the conductive spire containing liquid metal to be pumped, a tape formed by a conductive metal such as copper or nickel is inserted in that spire. The tape is interrupted at the level of the air gap of the main magnetic circuit at least when the conductive spire passes through that air gap.
    Type: Grant
    Filed: February 12, 1975
    Date of Patent: August 10, 1976
    Assignee: Groupement pour les Activities Atomiques et Avancees "GAAA"
    Inventor: Jean-Paul Le Frere
  • Guiding and positioning device for the block and hook of a derrick on a ship
    Patent number: 3955798
    Abstract: Improved guiding and positioning device for the block and hook of a derrick installed on board a ship, enabling dual speed boring, which, as an assembly formed by the block and the hook, is connected to a carriage sliding on two rails parallel to the axis of the well by two indentical mechanisms ensuring horizontal linear movement of the block and the hook.
    Type: Grant
    Filed: November 28, 1973
    Date of Patent: May 11, 1976
    Assignee: Groupement pour les Activities Atomiques et Avancees "GAAA"
    Inventor: Andre Meyer